Urahara and Hiyori head to the Maggot's Nest prison, which houses former members of the 13 Protection Squad's deemed dangerous to Soul Society. Once they arrive Urahara goes to see the most dangerous inmate, Kurotsuchi Mayuri. He asks Mayuri to join ... (more)his new organization the Technological Research Bureau as his Lieutenant. Meanwhile, Byakuya meets with his grandfather and Yoruichi whilst Ukitake tries to persuade Shiba Kaien to become his vice-captain. Also Aizen meets Ichimaru Gin for the first time.